화학공학소재연구정보센터
Journal of Materials Science, Vol.47, No.2, 772-778, 2012
Judd-Ofelt theory: optical absorption and NIR emission spectral studies of Nd3+:CdO-Bi2O3-B2O3 glasses for laser applications
This article reports on the optical absorption and NIR emission properties of Nd3+ ions doped CdO-Bi2O3-B2O3 (CdBiB) glasses. Judd-Ofelt theory has been applied to calculate the oscillatory strengths of the transitions in the absorption spectra and also the intensity parameters Omega(lambda) (lambda = 2, 4, and 6). These results were then used to compute the radiative properties of emission transitions of Nd3+:CdBiB glasses. From the NIR emission spectra of Nd3+:CdBiB glasses, three NIR emission bands are observed at 900, 1069, and 1338 nm and assigned to the transitions (F-4(3/2) -> I-4(9/2)), (F-4(3/2) -> I-4(11/2)), and (F-4(3/2) -> I-4(13/2)), respectively. The concentration quenching phenomenon has also been explained. The stimulated emission cross-section and FWHM values were calculated for all the Nd3+:CdBiB glasses.